1/* Copyright libuv project contributors. All rights reserved.
2 *
3 * Permission is hereby granted, free of charge, to any person obtaining a copy
4 * of this software and associated documentation files (the "Software"), to
5 * deal in the Software without restriction, including without limitation the
6 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
7 * sell copies of the Software, and to permit persons to whom the Software is
8 * furnished to do so, subject to the following conditions:
9 *
10 * The above copyright notice and this permission notice shall be included in
11 * all copies or substantial portions of the Software.
12 *
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
18 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
19 * IN THE SOFTWARE.
20 */
21
22#include "uv.h"
23#include "internal.h"
24
25#include <stdint.h>
26#include <stdlib.h>
27#include <string.h>
28
29#include <sys/types.h>
30
31#include <sys/time.h>
32#include <unistd.h>
33
34#include <procinfo.h>
35
36#include <ctype.h>
37
38extern char* original_exepath;
39extern uv_mutex_t process_title_mutex;
40extern uv_once_t process_title_mutex_once;
41extern void init_process_title_mutex_once(void);
42
43uint64_t uv__hrtime(uv_clocktype_t type) {
44  uint64_t G = 1000000000;
45  timebasestruct_t t;
46  read_wall_time(&t, TIMEBASE_SZ);
47  time_base_to_time(&t, TIMEBASE_SZ);
48  return (uint64_t) t.tb_high * G + t.tb_low;
49}
50
51
52/*
53 * We could use a static buffer for the path manipulations that we need outside
54 * of the function, but this function could be called by multiple consumers and
55 * we don't want to potentially create a race condition in the use of snprintf.
56 * There is no direct way of getting the exe path in AIX - either through /procfs
57 * or through some libc APIs. The below approach is to parse the argv[0]'s pattern
58 * and use it in conjunction with PATH environment variable to craft one.
59 */
60int uv_exepath(char* buffer, size_t* size) {
61  int res;
62  char args[UV__PATH_MAX];
63  size_t cached_len;
64  struct procsinfo pi;
65
66  if (buffer == NULL || size == NULL || *size == 0)
67    return UV_EINVAL;
68
69  uv_once(&process_title_mutex_once, init_process_title_mutex_once);
70  uv_mutex_lock(&process_title_mutex);
71  if (original_exepath != NULL) {
72    cached_len = strlen(original_exepath);
73    *size -= 1;
74    if (*size > cached_len)
75      *size = cached_len;
76    memcpy(buffer, original_exepath, *size);
77    buffer[*size] = '\0';
78    uv_mutex_unlock(&process_title_mutex);
79    return 0;
80  }
81  uv_mutex_unlock(&process_title_mutex);
82  pi.pi_pid = getpid();
83  res = getargs(&pi, sizeof(pi), args, sizeof(args));
84
85  if (res < 0)
86    return UV_EINVAL;
87
88  return uv__search_path(args, buffer, size);
89}
90